Menger Cat 23 Information, Review, Specs

Menger Cat 23 Drawing
Make
Menger
Model
Cat 23
Builder
Menger Boatworks
Designer
Menger/Sweisguth
Number Built
Production Year(s)
1990 - 2010

The Menger Cat 23, later produced as the Thom Cat 23, stands as a testament to the enduring appeal of the traditional Cape Cod catboat. Designed by the father-and-son team of William and Andrew Menger, this 22'6" vessel is often described as a "big little boat," a reputation earned by its extraordinary 10-foot beam. This width, nearly half the boat’s length, provides a level of stability and internal volume typically reserved for cruisers in the 30-foot range. Originally built in Babylon, New York, the Menger Cat 23 was specifically engineered to navigate the shallow, shoaly waters of Long Island’s South Shore, utilizing a heavy centerboard design that allows for a draft of just over two feet with the board up. Following the closure of Menger Boatworks in 2004, the legacy and tooling were preserved by Thompson Boatworks, which continues to support the fleet and offer new builds under the Thom Cat name.

Sailing Performance & Handling

The sailing characteristics of the Menger Cat 23 are defined by its massive gaff-rigged mainsail and its high-displacement hull. With a displacement of approximately 8,000 pounds—roughly 3,000 pounds of which is lead ballast—the boat is exceptionally stiff. Unlike narrow-beamed monohulls that heel quickly, the Cat 23 relies on its "form stability" provided by the 10-foot beam, allowing it to remain relatively level even in stiff breezes.

Handling a single large sail requires a specific technique, particularly regarding weather helm. As is common with traditional catboats, the Menger Cat 23 will develop a heavy pull on the tiller if over-canvassed. Experienced owners and technical reviews from the Catboat Association suggest reefing early; the boat often performs better and sails faster under a first reef once the wind exceeds 12–15 knots. Despite its heavy displacement, the large sail area gives it surprising agility in light air, where it can ghost along while more modern, under-canvassed designs struggle. Its tracking is helped significantly by a large barn-door rudder, though the manual effort required to steer in a blow reminds the sailor of the boat’s traditional working-class roots.

Interior Comfort & Variations

The interior of the Menger Cat 23 is where the design truly differentiates itself from other 23-footers. The 10-foot beam carries well forward, creating a cabin that feels cavernous. Most hulls feature a classic layout with a V-berth forward, two settees that double as berths, and a functional galley. One of the most significant selling points for cruising couples is the inclusion of a fully enclosed head, a rarity in a boat of this length.

Headroom is approximately 5'10" to 6'0" at the companionway, which is exceptional for a catboat. The use of teak trim and white bulkheads follows the traditional aesthetic, creating a warm, salty atmosphere. While the primary model is the cruising version with a full cabin, some custom variations exist. It is also important to distinguish the Cat 23 from its sibling, the Menger Oysterman 23. While the Oysterman shares a similar hull philosophy, it features a cutter or sloop rig and a different deck configuration, catering to those who prefer multiple sails over the simplicity of the single gaff-headed main.

Known Issues & Buyer’s Checklist

Prospective buyers should focus their inspections on the unique mechanical systems of a gaff-rigged centerboarder. While Menger built a robust fiberglass hull, the following areas require scrutiny:

  • Centerboard Pendant and Trunk: The cable or rope used to raise and lower the heavy centerboard is a wear item. Inspect the pendant for fraying and the trunk for any signs of "thumping" or structural stress where the board pivots.
  • Mast Step and Tabernacle: Many Menger Cats were equipped with a folding mast. Check the pivot point and the deck surrounding the mast step for compression or moisture intrusion in the core.
  • Gaff Jaw and Rigging: The gaff jaws (where the upper spar meets the mast) are subject to high friction. Look for wear on the mast and the leathering of the jaws. Additionally, inspect the blocks and tackle used for the peak and throat halyards, as these systems carry significant loads.
  • Inboard Engine Access: Most Cat 23s are powered by a small diesel (often a Yanmar). Because the engine is tucked under the cockpit sole, access for maintenance can be tight; check for evidence of neglected oil changes or cooling system leaks due to difficult reach.

Community & Resources

The Menger Cat 23 benefits from one of the most dedicated owner communities in the sailing world. The Catboat Association serves as the primary hub for technical data, maintenance tips, and organized "rendezvous" events. Because the design is still supported by Thompson Boatworks, owners have a rare direct line to professional expertise and replacement parts specifically tailored to the Menger molds.

The Verdict

The Menger Cat 23 is a specialist’s boat, appealing to those who value traditional aesthetics, immense stability, and the ability to cruise in thin water. It trades the pointed performance of a modern sloop for the soul and space of a classic New England cruiser.

Pros:

  • Massive Interior: The 10-foot beam provides more living space than almost any boat in its size class.
  • Shallow Draft: Ideal for gunkholing and exploring areas inaccessible to fin-keel boats.
  • Simple Rig: The single-sail gaff rig is easy to understand and provides excellent light-air performance.
  • High Build Quality: Robust fiberglass construction that has aged well across the fleet.

Cons:

  • Weather Helm: Can be physically demanding to steer if the sail is not reefed properly in heavy air.
  • Trailerability: While technically trailerable, the 10-foot beam requires wide-load permits in many jurisdictions.
  • Heavy Displacement: Requires a significant tow vehicle and is not a "quick launch" daysailer.

Measurements

Construction & Hull

Construction Material
Fiberglass
Hull Type
Monohull Sailboat
Keel Type
Centerboard
Rudder
1x —
Ballast
-
Displacement
6500 lbs
Water Capacity
55 gal
Fuel Capacity
12 gal

Dimensions

Length Overall (LOA)
22.5 ft
Waterline Length (LWL)
21.33 ft
Beam
10 ft
Draft
5.5 ft
Max Headroom
-
Air Draft
34 ft
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Cat Rig
P (Main Luff)
-
E (Main Foot)
-
I (Foretriangle Height)
-
J (Foretriangle Base)
-
Forestay Length (est)
-
Sail Area
435 sqft

Calculations

Sail Area / Displacement (SA/D) Ratio
19.98
Ballast / Displacement Ratio
Displacement / Length Ratio (D/L) Ratio
299.01
Comfort Ratio
21.57
Capsize Screening Formula
2.14
Hull Speed
6.19 kn